eev.ee/blog/2016/04/1…
(my take on emoji is a little different from @eevee's but theirs is close enough)
1. Color ruins text rendering
2.
3. grouplens.org/blog/investiga…
4. Accessibility (screenreaders)
5. They're unbounded
[…]
8. theatlantic.com/politics/archi…
9. Unnecessary gendering (despite Unicode saying not to)
10. Existing characters getting rendered as emoji
Conclusion: AOL/Slack/GitHub got it right with ligatures (e.g. :sob:)